Blastoidea - Nucleocrinida - Nucleocrinidae

Nucleocrinus obovatus (Barris) Thomas, Iowa Geol. Surv. 29, p. 423 ff., pl. 36, figs. 1, 9, 16, 17, (not figs. 6-8), 1920

Belongs to Nucleocrinus according to A.O. Thomas 1924

Sister taxa: Nucleocrinus bosei, Nucleocrinus elegans

Ecology: stationary intermediate-level epifaunal suspension feeder

Distribution: found only at Spirifer pennatus beds, Fifth Ravine, along Cedar Creek, west of Buffalo (Devonian of Iowa)

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Specimen images are retrieved through the ePANDDA API.